Warp stop motion



Aug. 4, 1931. J, G. AHUN 1,817,119

WARP STOP MOTION Filed June 20, 1930 \7 R0 l? Flai' 1 f TV1 E '1 l Il I1 is Patented Aug. 4, 1931 UNITED STATES PMENT OFFICE JOHN-G. .AHLI-N, OF WORCESTER, v'IASSACI-USETTS, ASSIGNOP. TO CROMTGN & KNOWLES LOCM WGRKS, OF WORCESTER, MASSACHUSETTS, A CGRPORATION OF MASSACHUSETTS VARP STOP IVIOTION Application filed `Tune 2D,

This invention relates to warp stop motions 4either of the mechanical or electrical type, and it is the general object of the invention to facilitate the assembly of motions employing i several similar units which may be built up to provide a stop motion having any desired number of banks of drop wires.

In the form of motion to which my invention more particularly relates there is a horilfi zontal supporting member on which is strung several' substantially similar but separate units so related that the drop wire separator bars and also-the detecting bars may be held Vbetween the units in properly spaced relation. i Although the invention is illustrated herein Yin connection withan electrical motion, yet the invention is not limited to electrical apparatus. f l

In assembling a motion of this type the perator is required to handle a detector and also a separator bar for each unit, and it is an important object of the invention to provide supporting means for one of these elements while the other is being manipulated by the 25 user. More specifically, it is an object of the invention to provide each of the separator units with a finger or the like effective to support the separator bar when adjacent units are separated sufliciently to permit in- 30 sertion of the detector bar. I

It is a further object of the invention to relate the parts in such a way that the finger which supports the separator bar may also serve'to align the units and keep them from turning with respect to each other and the supporting member during the assembling operation.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth inthe claims.

In the accompanying drawings, wherein a convenient embodiment of my invention is set 45 forth, p

Fig. 1 is a vertical section through a warp stop motion made according to my invention, 'a part of one of the separator units being broken away to illustrate the invention more clearly, Y

1930. Serial No. 462,57-.

Fig. 2 is a plan view of the structure shown in Fig. 1,

Fig. 3 is a vertical section along line 33 looking in the direction of the arrows, Fig. 1,

Fig. et is a vertical section looking in the direction of arrows 4 4, Fi 1, and

Fig. 5 is a diagrammatic view showing the manner in which my invention operates when the motion is being` assembled.

Referring to the drawings, the loom frame supports a bracket 11 in which is mounted for vertical adjustment a post 12. The latter has supporting relation with respect to a horizontal screw 13 which extends substantially parallel to the warp threads lV and may lie close to the adjacent loomside. rThere is shown in the present drawings a structure on one side of the warp threads only, but it is to be understood that the cross members, such as the detector and separator bars, will be supported at each side of the warp threads by a structure substantially as set forth herein. Mounted on the screw A3 is a plurality of separator units lil each having vertical surfaces 15 which lie opposite corresponding surfaces 16 on the adjacent unit. The outside electrode 17 of an electric Contact bar is located between these surfaces 15 and 1G and is held frictionally by them in fixed position. Each unit is provided with a notch or groove 18 having a lower edge 19 on which the sep arator bar 20 may rest, and the notch has a vertical surface 21 opposite a sui-face 22 on the adjacent unit, said surfaces clamping the separator bar in position. An end holder may be interposed between the outside nut 2A;

`and the nearest unit 14, and the unit at the opposite end of the motion, or that at the right as shown in Fig. 1,l may be positioned by a. nut 25. The separators are spaced so as to define compartments or guideways for banks ofdrop wires D, and the latter have slots S through which the Contact or detector bar 17 extends.

The matter thus far described forms no part of my present invention and may be adapted to take n'iechanical forms of detector bars as well as the electrical form set forth herein.

In carrying my invention into effect I pro- 'vide the lower portion of each of the units and also the holder 23 with a pocket 30 into which extends a finger 31 projecting from Y place the next one to be added will be positioned by the tongue of the first and` held thereby against substantial angular displacement around the screwr 13.

Fig. 5 shows diagrammatically how the tongue facilitates assembly. It is assumed i that the right hand unit is in vproper position and that its separator bar 20 is supported on the lower surface 19 andalso the finger 31. The left hand unit is spaced sufficiently on the first one to permit the contact bar 17 to be moved downwardly as shown, but it will be noted that the linger 31 is close enoughto the leftunit so as to support the separator bar even though the latter should slide down from 1 the inclined'position shown.. 1n this way it is possible for the operator to hold-the separator bar kbetween two units which are spaced suiciently'to permit insertion of the detector bar.

assembly of a warp stop motion made on the unit principle-, the construction permitting placement of the separator bar' ina pocket Vwhich will retain it and then adding lthe .detector bar. Adjacent units may be displaced` angularly a slightamount, and when so positioned', the operator may press the left unit against the one already in placewithoutfbeing careful to maintainits spacing and still ybe able to put the detectorbar in place.. After the latter is in position the left hand unitmay then be turned `to cause the finger 'to' registerV with'the pocket, after which the parts may be drawn together. Allso, the finger 31 actsV to prevent relativeangular displacementoftwo adjacent units.

'Having thus described my invention it will be seen that changes and modifications-:may

be madetherein by those kskilled in the art n without vdeparting from the spirit and scope j of the invention and I do not'wishto be limited to the. details herein disclosed, but what I claim is: j Y

1.: In a.- warp stop motion, a plurality of substantially similar units arranged one adjf jacent Lthe other,a holderjfortl1eunits,'a;de-`

Y the detectorv bar.

Y pocket. have provided-a simple devicefor facilitating tector bar lying between two adjacent units, a separator bar lying between said two units, and means supported by the holder to support the separator bar in position between the units when the elements are spaced apart a distance equal at least lto the horizontal dimension of the detector bar.`

2. In a warp stop motion,-a plurality of substantiallysimilar units arranged one adjacent the other, a detector element lying bef tween two adjacent units, aseparator bar lying between said two units, and means carriedV by'one of the units to support the separator bar-v in position between the'units when the elements are spaced apart a distance equal at least to the horizontal dimension of 3.111 a warp stopmotion, av plurality'of substantially similar units arranged .one adjacent t'he other, a detector element lying between twofadjaeentunits, Va separator bar lying-between said two units, Vandmeans on one unit normally overlappingthe other to'support the separator bar in positionbetween the units whenA the elements are spaced aparta :distance equal at' least to the horizontal dimension of the deteetorbarfv` lt is to be understood that before the units 4. 4Ina warp stop -motio'ma series ofjuXtaposed substantially similar units, adjacent units being formed with means defining an upper pocket, adetectormember toenter said .upper pocket, .adjacent units having other the units are' spaced sufficiently toafford entry of the detector'barin the firstnamed 5. Inawa-rp stop motion, a series of j uxtaposed Isubstantially similar units, adjacent ,unitsy being* formed with means defining an upper pocket, a detector member to enter said upper pocket, adjacent-units having other surfaces defining a second pocket, a separator bar in the second pocketyandvmeans on one unit normally overlapping the other to re- -tain the separator bar. in said second pocket when the units are spaced su-icientlyto afford entry of the detector :bar inthe firsty named pocket. j f n 6. In awarpy stopl motion, a plurality of juxtaposed substantiallyV similar units, a holder for. the-units? a detector bar, a separa.- tor bar, adjacent units having provisionfor clamping between them a detector bar and a .separator bar, said units being separable to .horizontalsupport, a plurality of substantially Vsimilar units strung along thev sup- Cil isc

port, a separator bar located between adjacent units, a detector bar located between said units, one of said units having a pocket, and a finger formed on the other unit to enter the pocket, said finger being located under the separator bar to have supporting relation with respect thereto when the units are spaced suliiciently to position the detector bar.

8. In a Warp stop motion, a substantially horizontal support, a plurality of substantially similar units strung along the support, a detector bar, adjacent units having adjacent surfaces to be spaced to permit the dctector bar to be moved to position, a separator bar located between the units, said units having overlapping portions so proportioned that when the said surfaces of the units are spaced apart a distance exceeding the horizontal dimension of the detector rod said overlapping portions Will have supporting relation with respect to the separator bar.

9. A claim according to the structure set 'forth in claim 7 wherein the support is cylinh drical and the units are movable angularly therearound, each unit having a portion adjacent its pocket to engage the units of the `adjacent finger and hold the units in spaced relation.

In testimony whereof I have vhereunto affixed my signature.

JOHN Gr. AHLIN. 

